APA citiranje

H G Zandstra. (1981). A methodology for on-farm cropping systems research. Philippines: IRRI.

Trích dẫn kiểu Chicago

H G Zandstra. A Methodology for On-farm Cropping Systems Research. Philippines: IRRI, 1981.

MLA citiranje

H G Zandstra. A Methodology for On-farm Cropping Systems Research. Philippines: IRRI, 1981.

Opozorilo: Ti citati niso vedno 100% točni.